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Preparation method of submicron crystal alumina ceramic abrasive material with specific shape

A technology of crystalline alumina and a specific shape, which is applied in the field of submicron crystalline alumina ceramic abrasives, can solve the problems of large sintering shrinkage and excessive deformation of the gel body, etc., and achieves improved wear resistance, high wear resistance, and is suitable for The effect of large-scale industrial production

Inactive Publication Date: 2013-03-20
SUZHOU CHUANGYUAN INVESTMENT DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, when the alumina slurry prepared according to the above patent is sintered, due to the large sintering shrinkage, the gel body will be deformed too much

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The present embodiment provides a preparation method of triangular submicron crystal alumina ceramic abrasive, which specifically includes the following steps:

[0023] (1) Weigh 50g of boehmite, disperse it in 200g of deionized water, and control its content at about 20wt%; add a certain amount of industrial nitric acid, adjust the pH to 4, stir for a long time, and control the stirring speed at Between 1000rpm, a sol of alumina was prepared; 6% methylcellulose was added to the sol.

[0024] (2) Process a cavity with a triangular shape on the stainless steel film strip material by etching, and inject the alumina sol into the mold. The external diameter of the triangle of the mold is 0.160mm, and stand at 70°C for 2 to 3 days , to solidify the slurry in the mold, shrink it, and take it out.

[0025] (3) Dry the solidified slurry at 80°C for 1 hour and sinter at 1350°C for 2 hours to obtain a triangular submicron crystal alumina ceramic abrasive.

[0026] The...

Embodiment 2

[0028] The present embodiment provides a method for preparing cylindrical submicron crystal alumina ceramic abrasive, which specifically includes the following steps:

[0029] (1) Weigh 50g of boehmite, disperse it in 200g of deionized water, and control its content at about 20wt%; add a certain amount of industrial nitric acid, adjust the pH to 4, stir for a long time, and control the stirring speed at Between 1000rpm, prepare alumina sol; add 6% methyl cellulose to the colloid.

[0030] (2) Process a cavity with a cylindrical shape on the stainless steel film strip material by etching, and inject the alumina sol into the mold. The cylindrical diameter of the mold is 0.160mm, and stand at 90°C for 1 to 2 days , to solidify the slurry in the mold, shrink it, and take it out.

[0031] (3) Dry the solidified slurry at 100°C for 0.5 hours and sinter at 1370°C for 2 hours to obtain a cylindrical submicron crystal alumina ceramic abrasive.

[0032] The prepared alumina ...

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PUM

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Abstract

The invention relates to a preparation method of a submicron crystal alumina ceramic abrasive material with a specific shape, comprising the following steps of: firstly, preparing alumina sol; then, injecting the alumina sol into a die with a specific shape; standing till a pulp is solidified; and taking out the solid, drying and sintering to obtain the submicron crystal alumina ceramic abrasive material with the specific shape. The method provided by the invention can be used for successfully preparing the submicron crystal alumina ceramic abrasive material with the specific shape, and therefore, the obtained submicron crystal alumina ceramic abrasive material with the specific shape has higher wear resistance; and in addition, the method provided by the invention is simple in process, environment-friendly and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of submicron crystal alumina ceramic abrasive and the submicron crystal alumina ceramic abrasive prepared by the method. Background technique [0002] Alumina-based ceramic materials are advanced ceramics with excellent properties such as high melting point, high hardness, high wear resistance, insulation, heat resistance, etc., especially in the abrasives industry, which are widely used. [0003] Microcrystalline alumina abrasive is a revolutionary new generation of abrasive, in which each abrasive grain is alumina ceramic with submicron grains, so it is also called ceramic abrasive. Compared with ordinary abrasives such as white corundum, it has strong cutting ability and high grinding efficiency, and can carry out large cutting depth, large feed and profile grinding; good self-sharpening, less grinding heat, low grinding temperature, and no burns Workpiece; high toughness, can continuously expose new cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/624
Inventor 戴杰冯涛张涛蒋丹宇邓浩陈家凡
Owner SUZHOU CHUANGYUAN INVESTMENT DEV